Moroccan police have prevented hundreds of migrants from crossing into Ceuta after dozens manged earlier on Sunday to cross the first border fence between Morocco and the Spanish enclave. They were all intercepted before they could cross into Spanish territory. Sunday has been a day of high tension in the area after hundreds of people gathered at the border following reported calls on social media for a collective breach attempt. The young migrants are mostly Moroccans but some come from elsewhere in Africa, the Spanish news agency EFE reported. The twin Spanish enclaves of Ceuta and Melilla a…